This is great work, but i still dont see the need to go into open loop at 0 psi. If this happens, then low boost power will suffer, since now the ECU will not adjsut A/F ratio anymore. Its been proven by many of us by datalogging, that our igniton adavance goes down right away into boost, so no worries there. IMO, closed loop boosting should be perfectly safe to around 8 psi. Now i know i have a hard time keeping the ECU into closed loop at that pressure. This will be great to try out, and see how it really affects low boost power... I really dont see the need to worry about how it is now though..unless you can keep your ECU into closed loop at higher boost..

13.5 @108 MPH-2.2 60ft(stupid FWD!)
S16G @ 18 PSI/FMIC/Running on MegaSquirt II (Now with sequential
fuel injection)
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-1998 Mitsubishi Eclipse RS-T- "Toy"
-1992 Plymouth Laser Turbo AWD(SOLD)
-2000 Honda CR-V(daily)